What does corallium mean in Latin?

corallium, a noun, means “coral (the substance, usually referring to the reddish-orange variety)”.

What is the genitive of corallium?

The genitive singular is coralliī. corallium is neuter, second declension.

In classical Latin, [kɔˈral.li.ũː]; in ecclesiastical (church) Latin, [koˈral.li.um].

noun · neutersecond declension

corallium n (genitive coralliī or corallī)

Classical[kɔˈral.li.ũː]Ecclesiastical[koˈral.li.um]

rāmus maris quī in āere dūrēscit

cūralium -iī (n) — in Metamorphoses I, ch. 10

declension
form	singular	plural
nominative	corallium curalium	corallia curalia
genitive	coralliī corallī, curalī, curaliī	coralliōrum curaliōrum
dative	coralliō curaliō	coralliīs curaliīs
accusative	corallium curalium	corallia curalia
ablative	coralliō curaliō	coralliīs curaliīs
vocative	corallium curalium	corallia curalia

Borrowed from Ancient Greek κοράλλιον (korállion, “coral”), probably ultimately of Semitic origin, see coral for more.

Descendants